A Chip-scale Optical Atomic ClockThe project aims to combining miniature diode lasers, photonic integrated circuits and MEMS vapour cells with atoms in a gas to develop a chip-scale optical atomic clock. By locking the frequency of a narrow-linewidth diode laser output to an atomic transition by shining the laser light through a gas of atoms, the frequency can be made extremely stable which provides long term timing accuracy. A frequency comb is then used to take the stable optical signal and down-convert this to an electrical output at MHz or GHz through the beat frequency from interference defined by the path length of an microring optical resonator. The project aims to develop microfabricated versions of all these components and heterogeneously integrate them together into a single-chip optical atomic clock.
Most of our timing that society depends on for running critical national infrastructure (utilities, communications, navigation, etc...) comes from GPS satellite signals but these are easy to jam or spoof with a potential loss of £5.2Bn to the UK economy over 3 days if they were disrupted as stated in the
UK National Risk Register. Hold over clocks with sufficient accuracy and stability are therefore required but at present these are too expensive and too large. While far cheaper chip scale atomic clocks are commercially available, their accuracy is only about 1 microsecond/day whilst many critical national infrastructure applications requires 1 nanosecond/day accuracy. Recently optical atomic clocks have been demonstrated in laboratories which have nanosecond/day accuracies but to date have been large and composed of discrete components on optics benches. This project aims to reduce the size, weight, power and cost of such optical atomic clocks for practical applications including navigation, telecoms and utility distribution.
The work will be under the supervision of Prof Douglas Paul who presently holds a Royal Academy of Engineering Chair in Emerging Technologies with the aim of developing cold atom atomic clocks, rotation sensors and accelerometers that can form a quantum navigator which could fit inside a mobile phone. The work will include being trained in the micro- and nano-fabrication of devices in the
James Watt Nanofabrication Centre combined with simulation and full characterisation of the devices using electronic and optical techniques. The successful student will have access to well equipped laboratories with a supporting group of researchers in complementary fields and the opportunities to present their research at international conferences. The project is in collaboration with a number of UK companies aiming to build a supply chain for practical optical atomic clocks.
In completing the PhD project, you will develop a range of skills that will enable you to have a career in either academia or industry. This will include; nano-fabrication, micro-fabrication, MEMS, vacuum systems, optics, integrated photonics, atomic physics and a range of simulation techniques. Previous PhD graduate students of Prof Paul hold a range of research fellowships, senior academic positions as well as senior positions in companies including ARM, Lockheed-Martin, Kelvin Nanotechnology, Sivers Photonics, Dixons Carphone, patent lawyers and multiple financial investment companies.
Requirements
The ideal candidate will have a background in physics, engineering, photonics, nanotechnology, materials science or chemistry. Background knowledge of semiconductors and optics / photonics would be beneficial but not essential. No prior nano-fabrication experience is required - you will be fully trained during the PhD. You must be self-motivated, have good interpersonal skills, and be interested in conducting interdisciplinary work that combines theory, simulation, fabrication and characterisation.
If you would like to apply, please contact
Prof PaulYou can also find details of the application process at:
http://www.gla.ac.uk/research/opportunities/howtoapplyforaresearchdegree/.